摘要 |
The electroconductive paste comprises (A) globular Zn powder 100wt.% (particle size is below 30 micrometer, av. size is 0.1-30 micrometer) , (B) glass powder 0.01-10 wt.% (softening point 500-800 deg.C, i.e. PbO-B2O3-SiO2, PbO-B2O3 or ZnO-B2O2-SiO2 glass powder, (C) vehicle 19-21 wt.% for making paste state i.e. α-terpineol contg. ethyl or nitrocellulose or polyvinyl alcohol 20wt.% and (D) additive 0.01-5 wt.% selected from PbO4, Bi2O3, Pr6O11, CuO, CdO. The prepd. paste is useful for ceramic condensers, thermisters and varistors. |